Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/03/2024, 09:36

General

  • Target

    8fe9ec621008b29e7c47a4a2fc492d28.exe

  • Size

    2.0MB

  • MD5

    8fe9ec621008b29e7c47a4a2fc492d28

  • SHA1

    f8930f4037b081f0c54b00f0d1e93d936a7af669

  • SHA256

    a7a7a60fa640fc9a4dbdbac52b68a1774bb159b99c179df650c9f41fd4d20a6a

  • SHA512

    2eb25f96e289fee6ad2f70710c39b27c30db889f683a24a4592c47862cfeec84f2c25dacc73d267897f67dc3ec212de4065e0c2719188bc01aaded9af7512b41

  • SSDEEP

    49152:32dOY3q2cSnjXhVR5ZbNk6tpebYwyq0yRa2pQroFa98:m93F1jTR5Z7uM5LkGroFa6

Malware Config

Extracted

Family

socks5systemz

C2

http://ceztdio.net/search/?q=67e28dd86c0ea7794406f94d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa44e8889b5e4fa9281ae978f671ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ffe10c8e993993b

http://ceztdio.net/search/?q=67e28dd86c0ea7794406f94d7c27d78406abdd88be4b12eab517aa5c96bd86e490874896148ab2865b77f80ebad9cc0f7cb63037ed2ab423a4334383ba915d911ec07bb606a0708727e40ea678c45abbe74ffb0e2807e12571c17f3e83fe16c1ee94923dcb6c96

Signatures

  • Detect Socks5Systemz Payload 5 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8fe9ec621008b29e7c47a4a2fc492d28.exe
    "C:\Users\Admin\AppData\Local\Temp\8fe9ec621008b29e7c47a4a2fc492d28.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3472
    • C:\Users\Admin\AppData\Local\Temp\is-2SFG5.tmp\8fe9ec621008b29e7c47a4a2fc492d28.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-2SFG5.tmp\8fe9ec621008b29e7c47a4a2fc492d28.tmp" /SL5="$A0058,1717621,54272,C:\Users\Admin\AppData\Local\Temp\8fe9ec621008b29e7c47a4a2fc492d28.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:3336
      • C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe
        "C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:3320
      • C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe
        "C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4888

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe

          Filesize

          1.8MB

          MD5

          f782cc8d7fc86f98593827aa303629a1

          SHA1

          70b5f4a95c5af6c32c821f954f0d73112ce0315b

          SHA256

          2595cec4a4386043acc5e658726c68aa82a076057f2a7eb87db53243d4c7062e

          SHA512

          41eb04c69cfe003e6c9ad6488136cd03085326248c3275a3db4d4d64b489cfc43e4edb09b5f9d4443df56c512cd9936854c2be7304b3e8aa5c4230a08e1c1775

        • C:\Users\Admin\AppData\Local\Temp\is-2SFG5.tmp\8fe9ec621008b29e7c47a4a2fc492d28.tmp

          Filesize

          677KB

          MD5

          88d7ea648defbc2597fa38ef83112eda

          SHA1

          2bce9acfb1b5e08dc29c695eff12fc80949c6440

          SHA256

          5a53b8bd78b1bbf24136b4d8d8191f503abcc24934626ed6f15bf9f6dee17b68

          SHA512

          050ce971e1f7a4e92d272c9c3c9f96f1214286523b018a75084c76dbebb5f32a717afbd9af9c68b7ad71f738c0a331640a8fe765cb4def90678eae4769b2e66a

        • C:\Users\Admin\AppData\Local\Temp\is-ERO37.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-ERO37.tmp\_isetup\_isdecmp.dll

          Filesize

          32KB

          MD5

          b6f11a0ab7715f570f45900a1fe84732

          SHA1

          77b1201e535445af5ea94c1b03c0a1c34d67a77b

          SHA256

          e47dd306a9854599f02bc1b07ca6dfbd5220f8a1352faa9616d1a327de0bbf67

          SHA512

          78a757e67d21eb7cc95954df15e3eeff56113d6b40fb73f0c5f53304265cc52c79125d6f1b3655b64f9a411711b5b70f746080d708d7c222f4e65bad64b1b771

        • memory/3320-49-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/3320-44-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/3320-45-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/3320-48-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/3336-7-0x0000000000660000-0x0000000000661000-memory.dmp

          Filesize

          4KB

        • memory/3336-56-0x0000000000660000-0x0000000000661000-memory.dmp

          Filesize

          4KB

        • memory/3336-54-0x0000000000400000-0x00000000004B8000-memory.dmp

          Filesize

          736KB

        • memory/3472-2-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/3472-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/3472-53-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4888-59-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-83-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-52-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-60-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-63-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-66-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-69-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-71-0x0000000000870000-0x0000000000912000-memory.dmp

          Filesize

          648KB

        • memory/4888-74-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-75-0x0000000000870000-0x0000000000912000-memory.dmp

          Filesize

          648KB

        • memory/4888-80-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-55-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-84-0x0000000000870000-0x0000000000912000-memory.dmp

          Filesize

          648KB

        • memory/4888-87-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-90-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-93-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-96-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-97-0x0000000000870000-0x0000000000912000-memory.dmp

          Filesize

          648KB

        • memory/4888-98-0x0000000000870000-0x0000000000912000-memory.dmp

          Filesize

          648KB

        • memory/4888-102-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB

        • memory/4888-105-0x0000000000400000-0x00000000005D5000-memory.dmp

          Filesize

          1.8MB